We found 11 dictionaries that define the word dumbfounding:

General (10 matching dictionaries)

1. dumbfounding: Merriam-Webster
2. dumbfounding: Collins English Dictionary
3. dumbfounding: Vocabulary.com
4. dumbfounding: Wordnik
5. dumbfounding: Wiktionary
6. dumbfounding: Dictionary.com
7. dumbfounding: Rhymezone
8. dumbfounding: FreeDictionary.org
9. dumbfounding: Mnemonic Dictionary
10. dumbfounding: TheFreeDictionary.com

Business (1 matching dictionary)

11. dumbfounding: Legal dictionary

(Note: See dumbfound_or_dumfound as well.)

Definitions from Wiktionary (dumbfounding) ▸ adjective:  Bewildering; astonishing. Opposite: understandable, clear, obvious, expected, unsurprising ▸ Words similar to dumbfounding ▸ Usage examples for dumbfounding ▸ Idioms related to dumbfounding ▸ Wikipedia articles (New!) ▸ Popular nouns described by dumbfounding ▸ Words that often appear near dumbfounding ▸ Rhymes of dumbfounding ▸ Invented words related to dumbfounding